What are the three types of fall protection for an unprotected side or edge?

The correct answer identifies the three fundamental types of fall protection for unprotected sides or edges as a guardrail system, a safety net system, and a personal fall arrest system.

A guardrail system is a physical barrier that prevents personnel from falling over an edge. It is typically installed at the height of 42 inches and requires mid-rails and toe boards to provide comprehensive protection. This system is effective as it can be left in place continuously, providing consistent safety for workers without requiring additional action from them.

A safety net system serves to catch employees in the event of a fall, preventing them from hitting the ground or other lower levels. These nets are strategically placed below work areas and designed to absorb the fall energy, further ensuring safety in cases where a fall might occur.

The personal fall arrest system involves a harness worn by the worker, which is connected to an anchor point. This system is designed to stop a fall in progress and reduce the risks of serious injury during a fall event. It gives workers a level of mobility while ensuring that they are securely attached.

The other options contain either incomplete elements related to fall protection or introduce components not primarily recognized as forms of fall protection for unprotected sides or edges. The effective combination of these three recognized systems